Scientific Evidence_Why is Archelis good for your legs and back？– なぜ、アルケリスが立ち作業者の足腰に良いのか？ –

Why is Archelis good
for your legs and back？

Ideal standing posture

Distribution of weight

When standing unassisted, our weight is concentrated on the soles of our feet, leading to pain or fatigue.

By distributing weight across the thighs and shins, Archelis can reduce stress on the feet by up to 50%. This can help relieve chronic pain or fatigue caused by prolonged standing.

Weight is distributed and supported by Archelis

Data

In a study conducted by the Ministry of Health, Labour and Welfare, it was found that the use of Archelis reduced the strain on key muscle groups in the legs and back. The study showed a decrease of up to 41% of activity in the erector spinae and calf gastrocnemius muscles.

令和3年度厚生労働省「高年齢労働者安全衛生対策機器実証実験事業」筋電位計測の様子

Comparison of the results of muscle potential measurement during standing work with and without Archelis

Additionally, musculoskeletal analysis on a human model showed a reduced load on the lower back by up to 33%. From these studies and simulations it has been shown that Archelis can reduce the strain of standing work.

Simulation results of musculoskeletal analysis with and without Archelis

Research Papers

Clinical Use of a Wearable Lower Limb Support Device for Surgeries Involving Long Periods of Standing

■Journal
November 2018 Journal of Japan Society of Computer Aided Surgery 20(3):121-125

■Title
Clinical Use of a Wearable Lower Limb Support Device for Surgeries Involving Long Periods of Standing

■Authors
Hiroshi Kawahira ¹, Ryoichi Nakamura ², Yoshihiro Shimomura ³, Takashi Oshiro ⁴, Shinichi Okazumida ⁵

¹ Medical Simulation Center, Jichi Medical University
² Center for Frontier Medical Engineering, Chiba University
³ Division of Design Science, Graduate School of Engineering, Chiba University
⁴ Department of Surgery, Toho University Medical Center Sakura Hospital

■Link
https://doi.org/10.5759/jscas.20.121

A wearable lower extremity support for laparoscopic surgeons A pilot study

■Journal
Asian Journal of Endoscopic Surgery Volume14, Issue1 January 2021 Pages 144-148

■Title
A wearable lower extremity support for laparoscopic surgeons: A pilot study

■Authors
Hiroshi Kawahira, Ryoichi Nakamura, Yoshihiro Shimomura, Takashi Oshiro, Shinichi Okazumi, Alan K. Lefor

■Link
https://doi.org/10.1111/ases.12812

■Journal
Cureus 16(9): e69775, September 20, 2024

■Title
Comparing Mental Strain and Subjective Sensations With and Without a Wearable Chair While Performing Simulated Suturing Tasks

■Authors
Shoichi Shinohara, Kosuke Oiwa, Yoshitaka Maeda, Tsuneari Takahashi, Yuji Kaneda, Naohiro Sata, Hironori Yamaguchi, Hiroshi Kawahira

■Link
https://doi.org/10.7759/cureus.69775

■Journal
VIDEOGIE Volume 4, No. 11 : 2019

■Title
Sit-stand endoscopic workstations equipped with a wearable chair

■Authors
Ippei Matsuzaki ¹, Takeshi Ebara ², Mafu Tsunemi ³, Mitsuhiro Fujishiro ⁴

¹ Department of Gastroenterology, Yamashita Hospital, Ichinomiya, Japan
² Department of Occupational and Environmental Health, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
³ Department of Nursing, Yamashita Hospital, Ichinomiya, Japan
⁴ Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Japan

■Link
https://doi.org/10.1016/j.vgie.2019.06.009

SAFETY AND EFFECTIVENESS OF A STATIC WEARABLE CHAIR FOR PATIENTS REQUIRING REHABILITATION

■Journal
Journal of Rehabilitation Medicine Clinical Communications . 2021 Nov 8:4:1000071

■Title
SAFETY AND EFFECTIVENESS OF A STATIC WEARABLE CHAIR FOR PATIENTS REQUIRING REHABILITATION: A PRELIMINARY REPORT

■Authors
Yoshitaka Maeda ¹, Kosuke Oiwa ², Tameto Naoi ³, Mitsuya Morita ³, Toshiki Mimura ⁴, Joji Kitayama ⁴, Hiroshi Kawahira ¹

¹ Medical Simulation Center, Jichi Medical University, Tochigi, Japan
² Department of Electrical Engineering and Electronics, Aoyama Gakuin University, Kanagawa, Japan
³ Rehabilitation Center, Jichi Medical University Hospital, Tochigi, Japan
⁴ Department of Surgery, Jichi Medical University, Tochigi, Japan

■Link
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8591300/

ARCHELIS A NEW SURGICAL WEARABLE CHAIR WITHOUT ELECTRICAL EQUIPMENTS

■Conference
SAGES 2017 Annual Meeting in Houston, TX. Emerging Technology Poster, March 22-25, 2017

■Title
ARCHELIS, A NEW SURGICAL WEARABLE CHAIR WITHOUT ELECTRICAL EQUIPMENTS

■Authors
Hiroshi Kawahira ¹, Ayano Toriumi ¹, Yui Uema ¹, Ryoichi Nakamura ¹

¹ Center for Frontier Medical Engineering, Chiba University

■Link
https://www.sages.org/meetings/annual-meeting/abstracts-archive/archelis-a-new-surgical-wearable-chair-without-electrical-equipments/

A study of the comparative evaluation system of the_ lower-limb exoskeleton

■Journal
HUMAN-COMPUTER INTERACTION, Vol.1958, Springer, pp.485- 492.

■Conference
International Conference on Human-Computer Interaction HCI International 2023, Copenhagen, Denmark.

■Title
A Study of the Comparative Evaluation System of the Lower-Limb Exoskeleton

■Authors
Yong-Ku Kong ¹, Sang-Soo Park ¹, Jin-Woo Shim ¹, Dae-Min Kim ², Heung-Youl Kim ³, and Hyun-Ho Shim¹

¹ Department of Industrial Engineering, Sungkyunkwan University, Seoul, Korea
² Department of ICT Convergence Engineering, Dongseo University, Busan, Korea
³ Physical Education Center, Nanzan University, Nagoya, Japan

■Link
https://link.springer.com/chapter/10.1007/978-3-031-49215-0_58

	Standing	Sitting	Archelis
Load on feet
Load on lower back
Mobility
Features	In addition to the fatigue caused by standing, the concentration of the weight load on the lower body causes pain in the soles of the feet.	Sitting on a chair rounds your back and crushes your pelvis, putting a strain on your lower back and causing stiff neck and shoulders.	When Archelis is worn, the pelvis stands up, the S-shape of the spine is maintained, the trunk is stabilized, and an ideal standing posture is maintained.

Scientific Evidence_Why is Archelis good for your legs and back？– なぜ、アルケリスが 立ち作業者の足腰に良いのか？ –

Why is Archelis goodfor your legs and back？